UIComponent中的parentDocument和parent

ParentAndParentDocument.mxml：

<?xml version="1.0" encoding="utf-8"?>

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"?

? xmlns:s="library://ns.adobe.com/flex/spark"?

? xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">

?

<fx:Script>

<![CDATA[

public var mesg:String = "This is a test message";

protected function testBtn_clickHandler(event:MouseEvent):void

{

trace(testBtn.parentDocument.mesg);

trace(testBtn.parent);

}

]]>

</fx:Script>

?

<fx:Declarations>

<!-- Place non-visual elements (e.g., services, value objects) here -->

</fx:Declarations>

<s:SkinnableContainer>

<s:Button id="testBtn" label="Click me" click="testBtn_clickHandler(event)" />

</s:SkinnableContainer>

</s:Application>

?

?

?

输出：

?

This is a test message

ParentAndParentDocument.ApplicationSkin2._ApplicationSkin_Group1.contentGroup.SkinnableContainer5.SkinnableContainerSkin6.contentGroup